by federal authorities. but in the beginning, he will not be given theusualmirandawarningabout the right to remain silent. instead, the government will invoke a rule that allows questioning a suspect without giving advice of rights. >> there is a public safety exemption in cases of national security, and central charges involving acts of terrorism, and so government has that opportunity right now. >> the government invoked that same rule in the case of the so-called underwear bomber. as in his case, it allows questioning to learn of any potential plots or accomplices that could present a continuing threat. >> the first questions the fbi will focus on are specific threats that he might be aware of. likely, are there any other improvised explosive devices? were there other people working in the network? the sorts of things that go directly to whether or not there's a continuing threat to public safety. >> reporter: he'll face charges brought by the justice department, because terrorism is a federal crime with a trial in a regular civilian court. and as in other high profile terrorism cases

be charged as early as today. investigators did not read himhismirandarightswhen he was captured. they invoked what they call the public safety exception. it permits law enforcement officials to interrogate a suspect and use that information as direct evident in court, and that is causing some controversy out there. let's talk about that. we'll talk about that in a few moments. also want to talk about other issues. joining us, former u.s. attorney doug jones who led the prosecutor against eric ruduffel, the 1996 atlanta olympic bomber. thank you for joining us. first of all, let's talk about this video. this video that has now surfaced that cnn has confirmed, a well known jihadist in dagestan who himself was killed in december, the video was posted on tamerlan tsarnaev's youtube channel. since then, it's been deleted. what does that say, if you're a u.s. attorney investigating this case, what does that say to you? >> well, wolf, i think it would be one of two things. there obviously could be some contact since he traveled over that way. there could have been some contact. there c